> > > > I made a few more changes.. An uncompiled & untested diff is attached:
> > > >
> > > > - pass l->l_proc to bus_dmamap_load() so we don't need to double  
> > > > buffer
> > > 
> > > Only do this if you vslock the buffer!
> > 
> > and vslock is fragile...
> 
> Hum. So we should probably stick with the double-buffer then ?

if it isn't performance critical, maybe.

for details, see PR/25639 and PR/32700.

YAMAMOTO Takashi